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以导电玻璃(FTO)为基底,采用连续阴极电沉积方法在多孔结构的ZnO薄膜上合成具有单一(111)择优取向的Cu2O,制备了Cu2O/ZnO复合薄膜。采用X射线衍射和扫描电镜分别对薄膜的结构及形貌进行了表征。光吸收谱显示复合薄膜在可见光范围内具有较好的光吸收性能。可见光催化降解罗丹明B的实验表明,由于在两半导体接触界面上发生了电荷的转移,Cu2O/ZnO复合薄膜比单一的Cu2O薄膜具有更高的光催化活性,在2.5h内对罗丹明B的降解率可达到70%,而在相同条件下Cu2O薄膜的降解率仅为60%。
Cu2O / ZnO composite films were prepared by the continuous cathode electrodeposition method on the conductive glass (FTO) substrate with a single (111) preferred orientation of Cu2O on a porous ZnO thin film. The structure and morphology of the films were characterized by X-ray diffraction and scanning electron microscopy. Optical absorption spectra show that the composite films have better light absorption in the visible range. Visible photocatalytic degradation of rhodamine B experiments show that due to the charge transfer occurs in the two semiconductor contact interface, Cu2O / ZnO composite film than a single Cu2O film has a higher photocatalytic activity, within 2.5h Rhodamine B The degradation rate can reach 70%, while under the same conditions, the degradation rate of Cu2O film is only 60%.